Stardust — A Cosmic Memorial for Your Loved One
Track Your Loved One's Journey Through Space After Cremation
Stardust is a free, science-based memorial web application that calculates how far the energy from a loved one's cremation has travelled through space at the speed of light. Inspired by the words of Carl Sagan and Neil deGrasse Tyson, Stardust offers a meaningful, poetic way to remember someone who has passed.
How It Works
Enter the name of your loved one and the date of their cremation. Stardust calculates the real-time distance their energy has travelled through the cosmos at 299,792.458 kilometres per second — the speed of light. The distance is displayed in kilometres, light-minutes, astronomical units, and light-years, and updates live every second.
The Science Behind Stardust
Carl Sagan famously explained that "the nitrogen in our DNA, the calcium in our teeth, the iron in our blood were made in the interiors of collapsing stars." Neil deGrasse Tyson expanded on this, noting that every atom in the human body is traceable to stars that exploded billions of years ago. When a body is cremated, the thermal energy released travels outward from that moment at the speed of light. Stardust makes that invisible journey visible.
Cosmic Milestones
As the journey progresses, Stardust tracks which celestial objects the energy has passed. Milestones include the Moon, the Sun, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, the Oort Cloud, the Heliopause, Proxima Centauri, Alpha Centauri, Sirius, Vega, the Pleiades, the Orion Nebula, the Pillars of Creation, and Sagittarius A* — the supermassive black hole at the centre of the Milky Way.
Printable Memorial Memento
Stardust includes a printable memorial keepsake formatted for standard 8.5×11 inch paper. The memento displays the person's name, cremation date, key distance statistics, an image of the last cosmic milestone their energy has passed, and a poem. It can be saved as a PDF and printed at home or at a print shop.
Who Is Stardust For?
Stardust is for anyone who has lost a loved one who was cremated and is looking for a beautiful, science-grounded way to think about that loss. It is a tool for grief, for wonder, and for connection — a reminder that the people we love do not simply disappear, but become part of something much larger than ourselves.
Frequently Asked Questions
What happens to your body's energy after cremation?
The thermal energy released during cremation radiates outward as heat and light at the speed of light. In a scientific and poetic sense, that energy continues travelling outward through the cosmos indefinitely.
How far does light travel in a year?
Light travels approximately 9.46 trillion kilometres in one year — a distance known as one light-year.
When does cremation energy reach the nearest star?
Proxima Centauri, the nearest star to our Sun, is 4.24 light-years away. Energy from a cremation reaches that distance after approximately 4.24 years.
Is Stardust scientifically accurate?
The distance calculations are based on the precise speed of light (299,792.458 km/s) applied to the time elapsed since the cremation date. The cosmic milestone distances are based on established astronomical data. The concept is rooted in real physics, presented in a poetic and emotionally meaningful way.